summaryrefslogtreecommitdiff
path: root/source3/smbd/auth_smbpasswd.c
diff options
context:
space:
mode:
Diffstat (limited to 'source3/smbd/auth_smbpasswd.c')
-rw-r--r--source3/smbd/auth_smbpasswd.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/source3/smbd/auth_smbpasswd.c b/source3/smbd/auth_smbpasswd.c
new file mode 100644
index 0000000000..ce0b03d942
--- /dev/null
+++ b/source3/smbd/auth_smbpasswd.c
@@ -0,0 +1,229 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 1.9.
+ Password and authentication handling
+ Copyright (C) Andrew Tridgell 1992-2000
+ Copyright (C) Luke Kenneth Casson Leighton 1996-2000
+ Copyright (C) Andrew Bartlett 2001
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+
+/****************************************************************************
+core of smb password checking routine.
+****************************************************************************/
+static BOOL smb_pwd_check_ntlmv1(const uchar *password,
+ const uchar *part_passwd,
+ const uchar *c8,
+ uchar user_sess_key[16])
+{
+ /* Finish the encryption of part_passwd. */
+ uchar p24[24];
+
+ if (part_passwd == NULL) {
+ DEBUG(10,("No password set - DISALLOWING access\n"));
+ /* No password set - always false ! */
+ return False;
+ }
+
+ SMBOWFencrypt(part_passwd, c8, p24);
+ if (user_sess_key != NULL)
+ {
+ SMBsesskeygen_ntv1(part_passwd, NULL, user_sess_key);
+ }
+
+
+
+#if DEBUG_PASSWORD
+ DEBUG(100,("Part password (P16) was |"));
+ dump_data(100, part_passwd, 16);
+ DEBUG(100,("Password from client was |"));
+ dump_data(100, password, 24);
+ DEBUG(100,("Given challenge was |"));
+ dump_data(100, c8, 8);
+ DEBUG(100,("Value from encryption was |"));
+ dump_data(100, p24, 24);
+#endif
+ return (memcmp(p24, password, 24) == 0);
+}
+
+/****************************************************************************
+core of smb password checking routine.
+****************************************************************************/
+static BOOL smb_pwd_check_ntlmv2(const uchar *password, size_t pwd_len,
+ uchar *part_passwd,
+ uchar const *c8,
+ const char *user, const char *domain,
+ char *user_sess_key)
+{
+ /* Finish the encryption of part_passwd. */
+ uchar kr[16];
+ uchar resp[16];
+
+ if (part_passwd == NULL)
+ {
+ DEBUG(10,("No password set - DISALLOWING access\n"));
+ /* No password set - always False */
+ return False;
+ }
+
+ ntv2_owf_gen(part_passwd, user, domain, kr);
+ SMBOWFencrypt_ntv2(kr, c8, 8, password+16, pwd_len-16, resp);
+ if (user_sess_key != NULL)
+ {
+ SMBsesskeygen_ntv2(kr, resp, user_sess_key);
+ }
+
+#if DEBUG_PASSWORD
+ DEBUG(100,("Part password (P16) was |"));
+ dump_data(100, part_passwd, 16);
+ DEBUG(100,("Password from client was |"));
+ dump_data(100, password, pwd_len);
+ DEBUG(100,("Given challenge was |"));
+ dump_data(100, c8, 8);
+ DEBUG(100,("Value from encryption was |"));
+ dump_data(100, resp, 16);
+#endif
+
+ return (memcmp(resp, password, 16) == 0);
+}
+
+
+/****************************************************************************
+ Do a specific test for an smb password being correct, given a smb_password and
+ the lanman and NT responses.
+****************************************************************************/
+uint32 smb_password_ok(SAM_ACCOUNT *sampass, const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info)
+{
+ uint8 *nt_pw, *lm_pw;
+
+ /* Quit if the account was disabled. */
+ if(pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
+ DEBUG(1,("Account for user '%s' was disabled.\n", user_info->smb_username.str));
+ return(NT_STATUS_ACCOUNT_DISABLED);
+ }
+
+ if (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)
+ {
+ if (lp_null_passwords())
+ {
+ DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", user_info->smb_username.str));
+ return(NT_STATUS_NOPROBLEMO);
+ }
+ else
+ {
+ DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", user_info->smb_username.str));
+ return(NT_STATUS_LOGON_FAILURE);
+ }
+ }
+
+ if (!user_info || !sampass)
+ return(NT_STATUS_LOGON_FAILURE);
+
+ DEBUG(4,("smb_password_ok: Checking SMB password for user %s\n",user_info->smb_username.str));
+
+ nt_pw = pdb_get_nt_passwd(sampass);
+
+ if (nt_pw != NULL) {
+ if ((user_info->nt_resp.len > 24 )) {
+ /* We have the NT MD4 hash challenge available - see if we can
+ use it (ie. does it exist in the smbpasswd file).
+ */
+ DEBUG(4,("smb_password_ok: Checking NTLMv2 password\n"));
+ if (smb_pwd_check_ntlmv2( user_info->nt_resp.buffer,
+ user_info->nt_resp.len,
+ nt_pw,
+ user_info->chal, user_info->requested_username.str,
+ user_info->requested_domain.str,
+ server_info->session_key))
+ {
+ return NT_STATUS_NOPROBLEMO;
+ }
+ DEBUG(4,("smb_password_ok: NT MD4 password check failed\n"));
+
+ } else if (lp_ntlm_auth() && (user_info->nt_resp.len == 24 )) {
+ /* We have the NT MD4 hash challenge available - see if we can
+ use it (ie. does it exist in the smbpasswd file).
+ */
+ DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
+ if (smb_pwd_check_ntlmv1(user_info->nt_resp.buffer,
+ nt_pw, user_info->chal,
+ server_info->session_key)) {
+ DEBUG(4,("smb_password_ok: NT MD4 password check succeeded\n"));
+ return NT_STATUS_NOPROBLEMO;
+ } else {
+ DEBUG(4,("smb_password_ok: NT MD4 password check failed\n"));
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+ }
+ }
+
+ lm_pw = pdb_get_lanman_passwd(sampass);
+
+ if(lp_lanman_auth() && (lm_pw != NULL) && (user_info->lm_resp.len == 24 )) {
+ DEBUG(4,("smb_password_ok: Checking LM password\n"));
+ if (smb_pwd_check_ntlmv1(user_info->lm_resp.buffer,
+ lm_pw, user_info->chal,
+ server_info->session_key)) {
+ DEBUG(4,("smb_password_ok: LM password check succeeded\n"));
+ return NT_STATUS_NOPROBLEMO;
+ } else {
+ DEBUG(4,("smb_password_ok: LM password check failed\n"));
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+ }
+
+ return NT_STATUS_LOGON_FAILURE;
+}
+
+
+/****************************************************************************
+check if a username/password is OK assuming the password is a 24 byte
+SMB hash
+return True if the password is correct, False otherwise
+****************************************************************************/
+
+uint32 check_smbpasswd_security(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info)
+{
+ SAM_ACCOUNT *sampass=NULL;
+ BOOL ret;
+ uint32 nt_status;
+
+ pdb_init_sam(&sampass);
+
+ /* get the account information */
+ ret = pdb_getsampwnam(sampass, user_info->smb_username.str);
+ if (ret == False)
+ {
+ DEBUG(1,("Couldn't find user '%s' in passdb file.\n", user_info->smb_username.str));
+ pdb_free_sam(sampass);
+ return(NT_STATUS_NO_SUCH_USER);
+ }
+
+ if ((nt_status = smb_password_ok(sampass, user_info, server_info)) != NT_STATUS_NOPROBLEMO)
+ {
+ pdb_free_sam(sampass);
+ return(nt_status);
+ }
+
+ pdb_free_sam(sampass);
+ return nt_status;
+}
+
+
generated by cgit (git 2.34.1) at 2024-07-14 19:45:20 +0000